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      The ethics of explantation

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          Abstract

          Background

          With the increased use of implanted medical devices follows a large number of explantations. Implants are removed for a wide range of reasons, including manufacturing defects, recovery making the device unnecessary, battery depletion, availability of new and better models, and patients asking for a removal. Explantation gives rise to a wide range of ethical issues, but the discussion of these problems is scattered over many clinical disciplines.

          Methods

          Information from multiple clinical disciplines was synthesized and analysed in order to provide a comprehensive approach to the ethical issues involved in the explantation of medical implants.

          Results

          Discussions and recommendations are offered on pre-implantation information about a possible future explantation, risk–benefit assessments of explantation, elective explantations demanded by the patient, explantation of implants inserted for a clinical trial, patient registers, quality assurance, routines for investigating explanted implants, and demands on manufacturers to prioritize increased service time in battery-driven implants and to market fewer but more thoroughly tested models of implants.

          Conclusion

          Special emphasis is given to the issue of control or ownership over implants, which underlies many of the ethical problems concerning explantation. It is proposed that just like transplants, implants that fulfil functions normally carried out by biological organs should be counted as supplemented body parts. This means that the patient has a strong and inalienable right to the implant, but upon explantation it loses that status.

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          Most cited references60

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          A review of acoustic power transfer for bio-medical implants

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            Is explantation of silicone breast implants useful in patients with complaints?

            In this review, we present a critical review of the existing literature reflecting the results of explantation of silicone breast implants in patients with silicone-related complaints and/or autoimmune diseases. A literature search was performed to discuss the following issues: which clinical manifestations and autoimmune diseases improve after explantation, and what is the course of these complaints after explantation. Next, we reviewed studies in which the effect of explantation on laboratory findings observed in patients with silicone breast implants was studied, and lastly, we reviewed studies that described the effect of reconstruction of the breast with a new implant or autologous tissue after explantation. We calculated from the literature that explantation of the silicone breast improved silicone-related complaints in 75 % of the patients (469 of 622). In patients with autoimmune diseases, however, improvement was only infrequently observed without additional therapy with immunosuppressive therapy, i.e., in 16 % of the patients (3 of 18). The effect of explantation did not influence autoantibody testing such as ANA. We discuss several possibilities which could clarify why patients improve after explantation. Firstly, the inflammatory response could be reduced after explantation. Secondly, explantation of the implants may remove a nociceptive stimulus, which may be the causative factor for many complaints. Options for reconstruction of the explanted breast are autologous tissue and/or water-/hydrocellulose-filled breast implant. Unfortunately, in very few studies attention was paid to reconstructive possibilities. Therefore, no adequate conclusion regarding this issue could be drawn. In conclusion, explantation is useful for improvement of silicone-related complaints in 75 % of the patients, whereas in patients who developed autoimmune diseases improvement is only observed when explantation is combined with immunosuppressive therapy. In a patient with silicone-related complaints in which explantation is considered, the patient should be counseled for the different options of reconstruction after explantation.
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              CARDIAC MAGNETIC RESONANCE IMAGING USING WIDEBAND SEQUENCES IN PATIENTS WITH NON-CONDITIONAL CARDIAC IMPLANTED ELECTRONIC DEVICES

              BACKGROUND Magnetic resonance imaging (MRI) has been performed safely in patients without MRI-conditional cardiac implantable electronic devices (CIED), but experience specifically with cardiac magnetic resonance imaging (CMR) is limited in this patient population. OBJECTIVE Evaluate the safety of CMR in non-MRI-conditional CIED and the interpretability of images using wideband sequences. METHODS We performed 114 consecutive CMR studies in 111 patients (mean age 59±14 years with 12 pacemakers, 73 implantable cardioverter defibrillators, 29 biventricular defibrillators) utilizing a wideband pulse sequence for late gadolinium enhancement (LGE) imaging. A standardized protocol for device management and patient monitoring was followed. Patients were evaluated for major clinical adverse events and device parameter changes immediately after CMR and at clinical follow-up. RESULTS A total of 111 CMR studies were completed successfully. There were no patient deaths, new arrhythmias, immediate generator or lead failures, electrical resets, or pacing capture failures in dependent patients. Right atrial, right ventricular, and left ventricular lead impedances were significantly lower post-CMR, median difference −7Ω (IQR −20 to 0Ω) (p<0.0001), 0Ω (IQR −19 to 0Ω) (p=0.0001), and −10Ω (IQR −30 to 0Ω) (p=0.023), respectively. These changes persisted through follow-up with median difference −18.5Ω (IQR −41 to −66Ω) (p=0.007) and −19Ω (IQR −44 to −7Ω) (p=0.006), and −30Ω (IQR −130 to 0Ω) (p = 0.003), respectively. Ninety-seven (87%) studies had no artifact limiting interpretation. CONCLUSIONS CMR can be performed safely in non-MRI-conditional CIEDs using a standardized protocol. Use of a wideband pulse sequence for LGE imaging yields a high rate of studies unaffected by artifact.
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                Author and article information

                Contributors
                soh@kth.se
                Journal
                BMC Med Ethics
                BMC Med Ethics
                BMC Medical Ethics
                BioMed Central (London )
                1472-6939
                8 September 2021
                8 September 2021
                2021
                : 22
                : 121
                Affiliations
                GRID grid.4714.6, ISNI 0000 0004 1937 0626, Department of Learning, Informatics, Management and Ethics, , Karolinska Institutet, ; 171 77 Stockholm, Sweden
                Article
                690
                10.1186/s12910-021-00690-8
                8428100
                34496854
                9ee659f8-08da-49c2-b03a-48680c2cc625
                © The Author(s) 2021

                Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver ( http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

                History
                : 26 June 2021
                : 28 August 2021
                Funding
                Funded by: Karolinska Institute
                Categories
                Research
                Custom metadata
                © The Author(s) 2021

                Medicine
                battery,breast implant,cochlear implant,explantation,implant,kant,neurostimulator,ownership,pacemaker,supplemented body part,ventricular assistive device

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